Educational worksheet on the states of matter, featuring definitions, examples, and interactive questions.

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Here’s a breakdown of the questions and their answers, along with explanations:

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1. What are the three forms of matter?

Answer: Solid, liquid, gas

Explanation:
Matter is anything that has mass and takes up space. The three main states (or phases) of matter are:
- Solid: Has a definite shape and volume.
- Liquid: Has a definite volume but takes the shape of its container.
- Gas: Has no definite shape or volume; it expands to fill its container.

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2. What are atoms?

Answer: Atoms are tiny building blocks that make up matter.

Explanation:
Atoms are the smallest units of matter that retain the properties of an element. Everything around us—solids, liquids, gases—is made up of atoms. These atoms are arranged and bonded together in different ways depending on the state of matter.

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3. When you boil water, it changes from a liquid to a gas. How have you ever boiled water? What for?

Answer: (Example) I’ve boiled water on the stove to make tea.

Explanation:
Boiling is a physical change where a liquid turns into a gas due to heat. When water reaches 100°C (212°F) at sea level, it boils and becomes steam (water vapor). This process is commonly used in cooking, making tea, or sterilizing objects.

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4. What is one difference between a solid and a liquid?

Answer: A solid has a fixed shape, while a liquid takes the shape of its container.

Explanation:
Solids maintain their shape because their particles are tightly packed and vibrate in place. Liquids flow and take the shape of their container because their particles are less tightly bound and can move past each other.

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5. Make an inference. Can you see an atom?

Answer: No, you cannot see an atom with the naked eye.

Explanation:
Atoms are extremely small—about 100 picometers (0.1 nanometers) in diameter. They are far too tiny to be seen by the human eye or even regular microscopes. Scientists use advanced tools like scanning tunneling microscopes to visualize atoms.

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6. Circle words or phrases in the passage that gave you a clue.

Answer: "tiny building blocks", "cannot see", "very close together"

Explanation:
These phrases suggest that atoms are small and not visible. For example:
- “Tiny building blocks” implies they are very small.
- “Cannot see” directly tells us we can’t see them.
- “Very close together” refers to how particles are arranged in solids.

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Final Notes:

This worksheet helps students understand:
- The three states of matter.
- The role of atoms in forming matter.
- Physical changes like boiling.
- The limitations of human perception regarding atomic structure.

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